Question

The outermost covering of the cell is called _______.
1. chloroplast
2. cytoplasm
3. cell membrane
4. cell sap

Answer 1

Correct Answer - Option 3 : cell membrane

The correct answer is Cell Membrane.

• Cell Membrane
  • This is the outermost covering of the cell, separating the contents of the cell from its external environment.
  • This is also known as Plasma Membrane which is made up of lipids and proteins.
  • It is a thin, flexible, and semi-permeable, or selectively permeable membrane.
  • The cytoplasm and nucleus are enclosed within the cell membrane.
  • Its main function is to maintain the shape of the cell by providing support to it.

• Chloroplast
  • It is the structure within the cells of plants and green algae which is the site of photosynthesis.
  • It is a type of plastid- a round oval, or disk-shaped body that is involved in the synthesis and storage of foodstuffs.
  • Chloroplasts are distinguished from other types of plastids by their green color.
• Cytoplasm
  • It is a fluid-like substance of vicious nature filled in the cell.
  • It is composed of water, salts, and various organic molecules.
  • Some intracellular organelles such as the nucleus and mitochondria are enclosed by membranes that separate them from the cytoplasm.
  • In Eukaryotic cells, the protoplasm surrounding the cell nucleus is known as the cytoplasm.
• Cell Sap
  • It is a fluid found in the vacuoles of the living cell.
  • It contains variable amounts of food and waste materials, inorganic salts, and nitrogenous compounds.
  • It plays an important role in osmosis in plant cells.
  • It serves the purpose of storage of materials and provides mechanical support.